The Rock Krawler double adjustable rear track bar and bracket assembly is awesome. The working height range is from three to six inches of lift. The Rock Krawler rear track bar bracket is actually attaches right to the axle tubes and is made of 1/4 inch thick laser cut steel. The factory rear track bar bracket simply locates and reinforces theirs, not the other way around. The rear track bar itself is made of 1.5" diameter solid alloy steel and comes with an Abuse Proof Lifetime Warranty.